batgrbproduct analysis for trigger=106415

batgrbproduct Analysis for Trigger=106415

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done using the HEASARC data.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Jan 22 22:58:06 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger106415
======================================================================

  Trigger: 00106415      Segment: 000

  BAT Trigger Time: 130509600.448   [s; MET]
      Trigger Stop: 130509601.472   [s; MET]
               UTC: 2005-02-19T12:40:01.049120    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 166.429163614216   Dec: -40.6800821105552  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8
     Image Trigger?:     NO
     Rate S/N Ratio:     14.6969384566991  [ if not an image trigger ]
     Image S/N Ratio:    8

  Flight Position:   [ source = BAT ]
    RA: 166.429163614216   Dec: -40.6800821105552  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 166.412871629105   Dec: -40.6848015687723  [deg; J2000]  
        { 11h 05m 39.1s , -40d 41' 05.3" }
         +/- 0.918195918923422 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.325665706723692 [arcmin] (formal 1-sigma fit error)
    SNR: 34.3611640813677
 
  Angular difference between Flight and Ground position is 0.793529 arcmin
 
  Partial Coding Fraction: 0.2324219    [ including projection effects ]

  Duration
     T90: 23.8120000064373 +/- 2.25817271194732
        Measured from: -3.51999999582767
                   to: 20.2920000106096     [s; relative to TRIGTIME]
     T50: 10.0320000052452 +/- 0.8513988517486
        Measured from: 3.34000000357628
                   to: 13.3720000088215     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 9.68000000715256     
                   to: 10.6800000071526     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -5.80799999833107     
                   to: 30.4000000059605     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.057818   2.121125   2.175980   0.383267
           0.059527   0.066701   0.060254   0.046377 [error]
 Peak      0.071675   0.146945   0.162879   0.039946
           0.011052   0.013605   0.013417   0.009178 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
=== Fluence/Peak Flux Summary ===
 
              Model    Band1    Band2    Band3    Band4    Band5    Total      
                       15-25    25-50   50-100  100-350   15-150   15-350   keV
Fluence   Power-law 4.58e-07 9.50e-07 1.54e-06 5.62e-06 4.26e-06 8.57e-06   erg/cm2
              Error 3.01e-08 3.83e-08 5.87e-08 4.64e-07 1.51e-07 4.97e-07   erg/cm2
Peak flux Power-law 8.59e-01 1.09e+00 1.00e+00 1.62e+00 3.50e+00 4.57e+00   ph/cm2/s
              Error 1.51e-01 1.22e-01 1.00e-01 3.22e-01 3.40e-01 4.43e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.39e-07 1.02e-06 1.74e-06 1.82e-06 4.08e-06 4.91e-06   erg/cm2
              Error 3.74e-08 4.49e-08 7.53e-08 4.06e-07 1.60e-07 4.18e-07   erg/cm2
Peak flux Cutoff-PL 6.71e-01 1.16e+00 1.15e+00 7.76e-01 3.43e+00 3.75e+00   ph/cm2/s
              Error 1.82e-01 1.42e-01 1.36e-01 3.66e-01 3.43e-01 4.90e-01   ph/cm2/s
 
Fluence        Band 3.41e-07 1.01e-06 1.73e-06 1.93e-06 4.10e-06 5.03e-06   erg/cm2
              Error -------- -------- 7.46e-08 -------- -------- --------   erg/cm2
Peak flux      Band 6.89e-01 1.15e+00 1.14e+00 8.50e-01 3.45e+00 3.83e+00   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s

 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.302    0.056    -      -           1.19e-02 4.08e-04  100.280 57
CPL   0.124    0.292      91.1    9.7      3.97e-02 1.16e-02   39.480 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.115    0.144    -      -           3.01e-02 2.83e-03   51.720 57
CPL   0.144    0.674     111.1   57.9      8.19e-02 6.08e-02   44.120 56
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err   : 90% error of the photon index
Epeak      : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm       : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedom

 
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
 
T90 in the 50-300 keV band: 21.696000 sec.
T50 in the 50-300 keV band: 9.344000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   36.208   -5.808   30.400
T90    23.812   -3.520   20.292
T50    10.032    3.340   13.372
Peak    1.000    9.680   10.680

Click here for the BAT GCN circular template

Special notes of this burst

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  166.4129   -40.6848   0.0056    43.1049  -133.4711         3.8362634     34.361 TRIG_00106415                 
 
Foreground time interval of the image:
 -5.808  11.253 (delta_t =  17.061 [sec])
Background time interval of the image:
-299.448  -5.808 (delta_t = 293.640 [sec])

Lightcurves

Notes:

1) The mask-weighted light curves are using the flight position.
2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
3) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
4) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
5) Time of each bin is in the middle of the bin.

1 s binning

From T0-310 s to T0+310 s

From T100_start - 20 s to T100_end + 30 s

Full time interval

64 ms binning

Full time interval

From T100_start to T100_end

From T0-5 sec to T0+5 sec

16 ms binning

From T100_start-5 s to T100_start+5 s

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

Quad-rate summed light curves (from T0-300s to T0+1000s)

Spectral Evolution

Spectra

Notes:

1) The fitting includes the systematic errors.
2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.

Time averaged spectrum fit using the average DRM

Power-law model

Time interval is from   -5.808 sec. to   30.400 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30155     ( -0.0562912   0.0560307 )
Norm@50keV  : 1.19227E-02    ( -0.000408083   0.000407933 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         100.28 using 59 PHA bins.
# Reduced chi-squared =         1.7593 for     57 degrees of freedom 
# Null hypothesis probability =   3.522957e-04
 
Photon flux (15-150 keV)    in 36.21 sec: 1.42282 ( -0.052381  0.0524956 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.2646e-06 ( -1.50859e-07  1.5099e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -5.808 sec. to   30.400 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.123833     ( -0.300897   0.282429 )
Epeak [keV] : 91.0944      ( -7.89741 11.5027 )
Norm@50keV  : 3.96728E-02    ( -0.00963466   0.0135975 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.48 using 59 PHA bins.
# Reduced chi-squared =         0.7050 for     56 degrees of freedom 
# Null hypothesis probability =   9.538556e-01
 
Photon flux (15-150 keV)    in 36.21 sec: 1.34501 ( -0.05465  0.05484 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.08376e-06 ( -1.5965e-07  1.59541e-07 ) ergs/cm2

Band function

Time interval is from   -5.808 sec. to   30.400 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.123704   ( -0.210947   0.353808 )
beta        : -10.0000    ( 10   0 )
Epeak [keV] : 91.0772      ( -5.35144 11.5018 )
Norm@50keV   : 3.96806E-02    ( -0.00965469   0.0136063 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.48 using 59 PHA bins.
# Reduced chi-squared =         0.7178 for     55 degrees of freedom 
# Null hypothesis probability =   9.432399e-01
 
Photon flux (15-150 keV)    in 36.21 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.10339e-06 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 18.8291  (-0.697132  0.732348)
R^2/D10^2   : 8.09666E-02  (-0.0101023   0.0113781)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          95.65 using 59 PHA bins.
# Reduced chi-squared =          1.678 for     57 degrees of freedom 
# Null hypothesis probability =   1.022803e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.050e-07   1.441e-08
25- 50  9.796e-07   4.943e-08
50-150  2.548e-06   1.381e-07
15-150  3.732e-06   1.428e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 6.08432       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         138.73 using 59 PHA bins.
# Reduced chi-squared =         2.4339 for     57 degrees of freedom 
# Null hypothesis probability =   9.140314e-09
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.486e-07   2.191e-08
25- 50  1.055e-06   3.802e-08
50-150  2.314e-06   9.016e-08
15-150  3.918e-06   1.430e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.55842        (-1.72713      2.11303)
R1^2/D10^2  : 0.621888        (-0.308722      0.843984)
kT2 [keV]   : 23.2751        (-1.91214      2.93795)
R2^2/D10^2  : 3.38037E-02    (-0.013387   0.00740287)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.93 using 59 PHA bins.
# Reduced chi-squared =         0.7078 for     55 degrees of freedom 
# Null hypothesis probability =   9.503693e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.418e-07   8.091e-08
25- 50  1.004e-06   1.302e-07
50-150  2.716e-06   2.509e-07
15-150  4.061e-06   4.307e-07

Peak spectrum fit

Power-law model

Time interval is from    9.680 sec. to   10.680 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.11549     ( -0.145561   0.143272 )
Norm@50keV  : 3.01492E-02    ( -0.00283382   0.00282954 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.72 using 59 PHA bins.
# Reduced chi-squared =         0.9073 for     57 degrees of freedom 
# Null hypothesis probability =   6.728603e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.50255 ( -0.339661  0.340256 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.13672e-07 ( -3.0847e-08  3.09141e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    9.680 sec. to   10.680 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.143734     ( -0.724398   0.622641 )
Epeak [keV] : 111.107      ( -25.3219 90.5179 )
Norm@50keV  : 8.18729E-02    ( -0.0378748   0.0837051 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.12 using 59 PHA bins.
# Reduced chi-squared =         0.7878 for     56 degrees of freedom 
# Null hypothesis probability =   8.748094e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.43385 ( -0.34278  0.34342 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.09043e-07 ( -3.208e-08  3.1921e-08 ) ergs/cm2

Band function

Time interval is from    9.680 sec. to   10.680 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.143600   ( -0.439425   0.649747 )
beta        : -10.0000    ( 10   0 )
Epeak [keV] : 111.086      ( -36.5774 90.5278 )
Norm@50keV   : 8.18874E-02    ( -0.0379333   0.0838034 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.12 using 59 PHA bins.
# Reduced chi-squared =         0.8022 for     55 degrees of freedom 
# Null hypothesis probability =   8.532282e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.45156 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 20.8402  (-2.19595  2.51769)
R^2/D10^2   : 0.153850  (-0.0483385   0.0681621)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.56 using 59 PHA bins.
# Reduced chi-squared =         0.9572 for     57 degrees of freedom 
# Null hypothesis probability =   5.670981e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.266e-08   2.255e-09
25- 50  6.479e-08   9.630e-09
50-150  2.096e-07   3.140e-08
15-150  2.870e-07   3.335e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 14.5681       (-1.40643     1.40631)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.82 using 59 PHA bins.
# Reduced chi-squared =          1.295 for     57 degrees of freedom 
# Null hypothesis probability =   6.636274e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.628e-08   1.827e-08
25- 50  6.980e-08   2.040e-08
50-150  1.531e-07   7.312e-08
15-150  2.592e-07   1.066e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.95580        (-3.65513      5.51768)
R1^2/D10^2  : 0.967227        (-0.65645      2.48221)
kT2 [keV]   : 28.1825        (-5.63252      20.3953)
R2^2/D10^2  : 4.72300E-02    (-0.0409286   0.0395596)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.41 using 59 PHA bins.
# Reduced chi-squared =         0.7892 for     55 degrees of freedom 
# Null hypothesis probability =   8.706668e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.116e-08   1.127e-08
25- 50  6.838e-08   3.585e-08
50-150  2.218e-07   1.130e-07
15-150  3.113e-07   1.598e-07

Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

Power-law model

 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.06242     ( -0.0622596   0.0614798 )
Norm@50keV  : 1.60820E-02    ( -0.000636104   0.000634655 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         102.36 using 59 PHA bins.
# Reduced chi-squared =         1.7957 for     57 degrees of freedom 
# Null hypothesis probability =   2.146033e-04
 
Photon flux (15-150 keV)    in 17.06 sec: 1.85921 ( -0.0763744  0.076566 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.90385e-06 ( -1.13975e-07  1.14044e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.244789     ( -0.349347   0.323789 )
Epeak [keV] : 102.486      ( -9.84509 14.6348 )
Norm@50keV  : 5.79279E-02    ( -0.0152235   0.0222614 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.76 using 59 PHA bins.
# Reduced chi-squared =         0.7815 for     56 degrees of freedom 
# Null hypothesis probability =   8.827870e-01
 
Photon flux (15-150 keV)    in 17.06 sec: 1.77441 ( -0.07841  0.07875 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.80802e-06 ( -1.20324e-07  1.19676e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.244992   ( -0.203781   0.244982 )
beta        : -4.76888    ( 2.06464   12.0646 )
Epeak [keV] : 102.464      ( -17.9173 18.7313 )
Norm@50keV   : 5.79422E-02    ( -0.0243443   0.0716223 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.76 using 59 PHA bins.
# Reduced chi-squared =         0.7956 for     55 degrees of freedom 
# Null hypothesis probability =   8.621601e-01
 
Photon flux (15-150 keV)    in 17.06 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

S(25-50 keV) vs. S(50-100 keV) plot

S(25-50 keV)  = 9.50e-07
S(50-100 keV) = 1.54e-06

T90 vs. Hardness ratio plot

T90                                   = 23.8120000064373 sec.
Hardness ratio (energy fluence ratio) = 1.62105

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 2.00519
Count Ratio (50-100 keV) / (15-25 keV) = 2.05705

Mask shadow pattern

IMX = -6.439178082441278E-01, IMY = 6.792333782720322E-01

TIME vs. PHA plot around the trigger time

TIME vs. DetID plot around the trigger time

100 us light curve (15-350 keV)

Spacecraft aspect plot

Bright source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

Time interval of the image:
-299.448000 -5.808000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
185.7946  -4.2541    2.6  36.7  162.1   1.1722   4.4 ------	UNKNOWN                       
186.8836 -31.8570    2.7  47.4 -159.2   1.4012   4.3 ------	UNKNOWN

Pre-slew background subtracted image of 15-350 keV band

Time interval of the image:
-5.808000 11.252600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
104.9845  23.3051    2.6  49.1    7.8   0.4084   4.5 ------	UNKNOWN                       
161.9496 -21.3413    2.2  24.3 -144.3   0.2311   5.2 ------	UNKNOWN                       
166.4129 -40.6848    0.3  43.1 -133.5   3.8362  34.4 ------	UNKNOWN                       
194.7139 -40.6168    2.8  57.5 -154.3   1.0782   4.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
79.252590 302.595700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5212 -40.5574    0.4  23.3    6.7   4.0586  27.6    0.4	Vela X-1                      
169.9386 -60.5278    0.0  19.9  -78.6  -0.3531  -2.2   12.5	Cen X-3                       
186.6979 -62.7198    2.7  25.1  -95.5   0.8980   4.3    3.2	GX 301-2                      
166.7209  -0.1240    2.2  40.6  107.0   3.0660   5.4 ------	UNKNOWN                       
144.2678  -5.6795    2.8  40.3   71.0   2.4233   4.1 ------	UNKNOWN                       
189.7430  -1.5984    2.8  44.4  140.9   2.0215   4.2 ------	UNKNOWN                       
192.8704 -10.8457    2.4  37.9  151.9   1.3202   4.8 ------	UNKNOWN                       
168.2278 -27.9198    2.4  12.9  113.7   0.7278   4.9 ------	UNKNOWN                       
200.1669 -25.5084    2.5  31.8  178.5   0.7736   4.5 ------	UNKNOWN                       
223.8637 -12.8730    4.1  57.1 -175.4   2.1774   2.8 ------	UNKNOWN

Plot creation:
Sun May 31 17:30:51 EDT 2015